Wet-pulverizing machine



(No Model.) 3 Sheets-Sheet 1.

S. P. M. TASKER.

WET PULVBR IZING MACHINE.

Patented Oct. 10,1882.

N. PETERS. Pmwuma n har. wnmngmn. 0. c.

3 Sheets-Sheet 2.

S.P.M.TASKEP,.

WET PULVERIZING MACHINE.

(No Model-) Patented Oct. 10; 1882.

(No Model.) a Sheefis-Sheet a T S.P.1VI.'TASKER.

WET PULVERIZ ING MAUHINE.

No. 265,713,. Patented 0011.10. 1882.

&

UNITED STATES PATENT OFFICE.

STEPHEN P. M. TASKER, OF PHILADELPHIA, PENNSYLVANIA.

WET-PULVERIZING MACHINE.

SPECIFICATION forming part of Letters Patent No. 265,713, dated October10, 1882.

Application filed March 6, 1882. (No model.)

To all whom it may concern:

Be it known that I, STEPHEN P. M. TASKER, of the city and county ofPhiladelphia, in the State of Pennsylvania, have invented certainImprovements in Wet-Pulverizing Machines, of which the following is aspecification.

My invention, broadly considered, relates to a certain novelpulverizing-machine invented by William Henry Thompson, of Islington,county of Middlesex, Kingdom of Great Britain, and patented .to him inand by Letters Patent of the United States No. 249,489, dated November15, 1881, to which Letters Patent reference is to be made for a moreclear comprehension of my improvements.

Broadly stated, Thompsons invention consists in the combination, withina suitable inclosing case embodying in its own structure avertically-erected hollow circular track, of an independent sphere orball adapted to revolve around the casing, and of given means forimparting to the ball not only revolution around the casing-track, butalso rotation about its own axis. Certain other features of constructionenter into the Thompson invention which are dispensed with by me, as theorganization of my machine avoids their employment.

In the Thompson machine, as also in mine, material to be pulverized isfed through a hopper into the casing, and is crushed by the combinedrevolution and rotation of the sphere or ball. The means employed byThompson for effecting the combined movement of the ball are a pair ofvertically-erected disks provided with peripheral beveledbearing-surfaces, and arranged face to face at some distance on eitherside of the center of a shaft horizontally journaled through the casing,and by which they are revolved. The disks are capable of rockingmovements by virtue of being each loosely hung or supported on the shaftbetween two collars having curved bearing-faces. The collars prevent alateral movement of the disks at their centers. Exterior to theirperipheral bearing-surfaces the disks are provided with ciently-pulverized material is by suitable means removed.

The operation of the disksand ball is described by Thompson in thefollowing language, which I regard as of importance to restate here, inorder that a more thorough comprehension of my improvements may be had.Thompson says:

The operation of the disks and ball is substantially as follows: \Vhenthe disks are revolved their tendency is to assume a position exactly atright angles to the shaft; but as they cannot do this, for the reasonthat the diameter of the ball at the point of contact exceeds thedistance between the adjacent bearing-faces, it follows that they bearor press upon the ball in their effort to assume this position and crowdthe latter against the casing with greater or less force, according tothe rapidity of the revolution. The disks also, by the friction of thecontact, carry the ball with them in their revolution about the casing,and thus communicate to it a centrifugal action. The disks also, by thefriction of this contact, communicate to the ball also an axialrotation. The ball, then,it will be understood, is caused to act uponthe material to be pulverized with a resultant force, which is obtainedfrom three distinct sources, as follows: first, the direct radial thrustwhich is received from the efforts of the disks to assume a position atright angles to the shaft, the bearing-faces of the same acting asinclined planes to crowd the ball against the inner surface of thecasing; second, the centrifugal action which results from the rapidrevolution of the ball around the easing, and, third, the grindingaction which results from the rotation of the ball upon its axis. Byadapting the disks to rock upon the shaft the ball is permitted to moveon radial lines to and from the shaft, according to the amount ofmaterial in the casin g, without being free at any time from the actionof the disks.

, My invention also relates to and embodies in its structure certainimprovements upon the Thompson machine, which are the invention ofHermann Bernhard Feldmann, of Philadelphia, Pennsylvania, and which areembraced in an application for Letters Patent executed by him February2, 1882, and filed in the United States Patent Office, March 2, 1882.

These improvements, briefly stated, consist of the application to theshaft of sleeve-journals keyed thereto, so as to revolve therewith. Eachof these sleeve-journals is of the form of a Parrott gun, the roundedbreech of which corresponds in curvature with a hemispherical socket inthe rear face ofthe disks in such manner that the disks fit closely uponthe breech. They also consist in the application of a spiral springsurrounding the shaft 'and' abutting against the opposing faces of thedisks.

They also consist ofjournal-boXes and packings for the shaft and itssurrounding sleevejournals of such construction as not only to enable avery perfect and smooth revolution, but also to exclude pulverizedmaterial from the revolving surfaces.

They, in addition, consist of the provision of tightening up nuts uponthe shaft, adapted to enable the endwise adjustment or set of thesleeve-journals.

Generally stated, my invention embraces,

first,the application of a clutch device between a the sleeve-journalsand rear faces of the disks; again, the application to the disks of aremovable peripheral beveled bearing-plate of chilled iron or other fitmaterial; again, the combination, with the blades of the disks, of whatI term take-ups, for returning to the action of the ball material notsufficiently fine to escape through the screen; finally, the provision,in connection with the casing, of com- .bined screens anddischarging-chutes.

In the accompanying drawings, Figure 1 represents in longitudinalvertical sectional elevation a pulverizing-machine embodying myimprovements. Fig. 2 represents the same in side elevation. Fig. 3 is aview in perspective of one of the'wearing-plates. Fig. 4 is a sectionaltop plan view taken through one of the take-ups and certain of theblades of the disk on the line 0 0 of Fig. 1. Fig. 5 is a view inperspective of one of the ball-operating disks, looking toward itsoutside or rear face, showing the seat for the clutch-lugs of thesleevejournal, and showing, also, the sleeve-journal and clutch-lugswhich operate the disks. Fig. 6 is a front elevational view of one ofthe disks, indicating the manner of application of the removableperipheral beveled hearing-plates.

Similar letters of reference indicate corresponding parts.

In the drawings, A represents the base of the casing, being a casting ofany desired configuration adapted to support the casing 13, which is acylindrical frame-work conveniently made in two sections centrallyunited, inclosed as to its upper side by the side plates, 0.

D is the continuous ball-track, being a ring of metal made in one piece,according to the invention of Mr. Feldmann.

E are the disks, whose removable peripheral beveled bearing-plates aredenominated by the letter F. I am the first to make these bearing-platesremovable, and I accomplish such result by any fit mechanical means. Asit will be readily understood that many methods of application may beresorted to, l have represented in Figs. 1 and 6 of the drawings aconvenient means of applying the same. I provide within the face of thedisk, which is shaped to receive the plate, arc-shapedperipherally-disposed seats G, and apply around the interioropening ofthebearing-plate arc-shaped tapering-su rfaced lugs, by whicharrangement, which is a familiar one to all mechanics, theseparatebearing-plate can be applied to the front face of the disk, thelugs entering the seats, and then be given a partial revolution, inorder to occasion the engagement of the projecting lugs with theundercut portions of the seats. This method is serviceable for thereason that the revolution of the disks with the ball can be madeavailable for the constant tightening up of the lugs within their seats.The method is also preferable to attachment by screws or bolts.

Iis the ball or crushing-sphere, which revolves upon the ball-track.

J are the sleeve-journals of Feldmann. The rear face of each disk iscentrally reamed out in the form of a hollow hemispherical socketadapted to seat itself upon the rounded breech of the sleeve-journals,and correspondingin curvature thereto in such manner that the disks fitclosely upon the breech.

K are clutch-lugs formed upon the sleevejournals back of the curvedsurface of the breech, and preferably cast as lateral projections fromsaid journals.

L are lug-seats formed in the rear face of the disks, into which theclutch-lugs of the sleevejournals are entered. The seats are of propersize to permit of a rocking of each disk upon its sleeve-journal withrespect to the clutchlugs.

M is the spiral spring surrounding the shaft, and operating upon theopposing faces of the disks.

N are what I term my take-ups, which are scoop-shaped devices formed inconnection with the blades 0 of the disks, and being in effect obliqueopenings around the periphery of the disks, communicating from the rearto the front face thereof. Their mouth or receiving-opening a is on therear face of the disk, and in the revolution of the latter the takeupsoperate as scoops to catch such particles of pulverized material as haveescaped through the blades, but which are not of sufficient size toescape through the screens. The take-ups catch these particles, and inthe revolution of the disks return them through theirdischarging-openings b to the space between the disks, so as to subjectthem to a further crushing action by the sphere. That form of take-upwhich is represented in the drawings I regard as an advantageousalthough not as a restrictive form, for it will be easily understoodthat any scoop-shaped device the mouth or scooping end of which isexterior to the operatingface of the disk and the discharging end ofwhich is upon the opposite side of the disk will act to return theparticles.

1? are screens, with which I inclose the en- IIO tire sides of thecasing, and which are made of such mesh as is desirable in view of theresultant size of the particles had in view. The screens may, ifdesired, be made removable, so that sets of different mesh may beemployed in the same machine, thereby enabling its use for theproduction of ground material of different degrees of fineness.

Q are chutes, also applied to the casing-at the lower portion thereofand exterior to the screens. Material of such size as to pass throughthe mesh of the screens finds its discharge by means of these chutes.

R are oil-cups, which I apply in connection with the journal-surfaces ofthe sleeve-journals andshaft;

S is an inlet for water, opening within the hopper of the machine.

. T are curved wearing-plates, of steel or chilled iron, ofhemispherical form, and of the character represented in Fig. 3. Two ofthese plates are inserted within the casing, around the lower portionthereof, on either side of the ball-track. They form a lining to thecasing of sufficient strength to withstand the constant attrition of theparticles of material to be pulverized. They arereinovable when wornout, and can be replaced by others.

Such being a description of my improved apparatus, which, as stated, isa wet pulverizer, its operation will be readily understood. I deem itsufficient to say that the operation of the screens in connection withthe take-ups of the disks renders practicable the thorough pulverizationto a predetermined degree of the material to be operated upon. Asheretofore stated, all such material asis not at first crushed to thedesired degree of fineness and which has escaped to the exterior of thedisks is returned by the take-ups and subjected a second time, or, ifnecessary, a series of times, to the operation of the ball.

Having thus described my invention, I claim- 1. In a pulverizing-machineof the class herein set forth, in combination with a casing containingtwo revolving disks and a ball carried thereby, screens incasing thesides of the casing, and outwardly and downwardly inclineddischarging-chutes, substantially of the character represented anddescribed.

2. In a pulverizing-machine of the class herein set forth, incombination with the disks, peripheral beveled bearing-plates and meansfor removably attaching the plates to the disks, substantially as andfor the purpose specified.

3. In apul verizing-machine of the class herein set forth, incombination with disks, radial blades, and take-ups ormaterial-returning devices which catch material exterior to the disksand discharge it between the disks, substantially as set forth.

4. In a pulverizing-machine of the class herein set forth, incombination with the sleevejournals, clutch-lugs or'kindrd devices, asand for the purpose specified.

5. In amachine of the class herein recited, in combination withsleeve-journals revolving upon and in connection with a driving-shaft,two disks surrounding said shaft and fitted to rock upon thesleeve-journals, a spiral spring surrounding said shaft and abuttingbetween the facing-surfaces of the disks, and clutch devices between thedisks and sleeve-journals, operating upon the rear faces of the disks,as and for the purpose specified.

In testimony whereof I have hereunto sign ed my name this 8th day ofFebruary,A. D. 1882.

STEPHEN P. M. TASKER.

In presence of- J. BONSALL TAYLOR, W. O. STRAWBRIDGE.

